Apparatus for making white lead.



Patented Nov. la, |902,

APPARATUS FDR MAKING WHITE LEAD.

(Applicaeiun med Julym. 1902.

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UNITED STATES PATENT OFFICE.

JOHN H. MONTGOMERY, OF ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-HALF TO ROBERT T. BROWN, OF ST. LOUIS, MISSOURI, AND CHARLES E. NEELEY, OF LITTLE ROCK, ARKANSAS.

APPARATUS FOR MAKING WHITE LEAD.

SPECIFICATION forming part of Letters Patent No. 714,009, dated November 18, 1902. Application filed \T 1115'19, 1902. Serial No. 116.198. (.No model.)

To all whom, it may concern): f mixing-machine 13, which is provided with Be it known that I, JOHN H. MONTGOMERY, the usual revolving mixing device 14, which of the city of.St. Louis, State of'Missouri, is driven from a main shaft 15 by means of have invented certain new and useful Imgear-wheels 16. provements in Apparatus for Making White The purpose of the mixing-machine 13 is 55 Lead, of whichthe followingY is a full, clear, to keep the atomized material moving and i and exact description, reference being had to prevent ils settling in the bottom of the said the accompanying drawings, forming a part mixing-machine and all the time subject the hereof. same to the oxidizing action of the water and xo The object of my invention is to simplify air in said machine. 60 the production of white lead and reduce the I next by means of a common pump 17 cost of same. withdraw the Vsolution from the mixing-ma- The figure is a sectional elevation, with chine 13 and force the same through the disparts broken away, of my improved appacharge-pipes 18, 19, and 20 into a rotary car- 15 ratus by which the white lead is manufacbonating-drum 2l, which is provided upon its 65 tured. interior with a series of, say, four strips of The lead is rst melted in a kettle l, which material having serrations or teeth 22. This is mounted over a furnace 2. A tube 3 leads `construction is more clearly shown in a dufrom thelower end of the kettle and extends plicate rotary carbonating-drum at the right 2o into a closed precipitating-chamber 4. The .hand of the drum 2l. Said drums are mount 7o tube 3,in connection with the air-pipe 5,forms ed in the usual way, and power is supplied an ordinary steam-atomizer, by means of to them by means of the belts 23. Within which the molten lead is atomized and dissaid drum 2l the material is subjected in the charged into the precipitating-cham ber 4 in well-known manner to the action of carbonica finely-divided state. acid gas, and the same is then discharged 75 Compressed air is to be supplied to the from the said drum by way of the door 24 pipe 5 from any suitable source and is coninto a spout 25, by means of which the matetrolled by means of avalve 6. The air passrialis grayitat-edinto another mixing-machine ing through the pipe 5 beneath the kettle 1 is 26, the construction of which is identical l 3o thoroughly heated by the fire of the furnace. with the mixing-machine 13, previously de- 8o In some cases I may make use of superheated scribed, and after the material has been fursteam instead of heated air for the purpose Vther agitated in said mixing-machine 26 said of atomizing the lead. The action of the material is removed from the same by means heated fiuid issuing from the pipe 5 and atof the pump 17. This is accomplished by omizer-tube 3 is to simultaneously atomize opening the valve 27 near the bottom of said 85 and partially oxidize the lead as it issues mixing-machine 26, and the material will from the tube 3. Water-spraying pipes, such thereby be pumped from the said mixingas 7, extend across the upper side of the machine 26intothecommon grinding-mill 28. chamber 4: and direct the spray of water The valves 29 and 30 should of course be 4o downwardly upon the atomized lead as it is closed during the last-mentioned operation, 9o discharged within said chamber, and the lead and the valve 31, which leads to the said grindis thereby forced downwardly and is directed ingmill, should of course be open. The to the center of said chamber by the inclined grinding-mill 28 is of the usual construction sides 8, and it is then washed into a central used by paint manufacturers and is driven trough 9, in which is locateda revolving con- -by means of a belt 32. By passing the ma- 95 veyer 10, which discharges the partially-oxiterial through the said grinding-mill the pardized particles through a spout 11 at the reticles will be still further comminuted by remote end of said chamber into a spout 12, moving a portion of the surface oxid from which leads the said material, together with the oxid-laden particles. From the mill 28 5o the water from the pipes 7, into a common the material is discharged into another comloo mon mixing-machine 33, the construction of which is identical with the mixing-machine 13 previously described, and the same is driven by means of gear-Wheels 34. From the mixer 33 the material is removed by Way of a pipe 35 and by means of the pump 17, the valve 36 being of course opened, the valves 27 and 30 closed, and in this manner the material may be again run through the grinding-mill 28 and the operation continued as long as is necessary to remove the surface oxid from the oXid-laden particles. After the particles have been sufficiently comminuted by removing their surface oxid, the valve 31 is closed and the valve 29 opened, and then the valve 37 should be closed and the valve 38 opened, which will permit the material to be discharged into the last one of the series v'of rotary carbonating-drums 2l, Where the product is again and finally subjected to the action of carbonio-acid gas.

I claiml. The combination in an apparatus for makingwhite lead, of an atomizer for molten lead, a closed chamber in which said atomizer is located, means within said chamber for producing Water-jets, and a conveyer at the bottom of said chamber, substantially as specified.

2. The combination in an apparatus for making white lead, of an atomizer for molten lead, a closed chamber in which said atomizer is located, means Within said chamber for producing Water-jets, a conveyer at the bottom of said chamber, and a mixing-machine into which said conveyer discharges the material, substantially as specified.

3. The combination iu an apparatus for making White lead, of an atomizer for molten lead, a closed chamber in which said atomizer is located, means Within said chamber izer is located, means Within said chamber for producing Water-jets, a conveyer at the bottom of said chamber, a mixing-machine into which said conveyer discharges the material, a rotary carbonating-drum, a pump for pumping the solution from lthe said mixing-machine to the said drum, and an additional mixing-machine into which the material is discharged from the said drum, substantially as specified.

5. The combination in an apparatus for4 making White lead, of an atomizer for molten lead, a closed chamber in which said atomizer is located, means within said chamber for producing Water-jets, a conveyor at the bottom of said chamber, a mixing-machine into which said conveyer discharges the material, a rotary carbonating-drum, a pump for pumping the solution from the said mixing-machine to the said drum, an additional mixing-machine into which the material is discharged from the said drum, and a grinding-mill into which the material is discharged from the said last-mentioned mixing-machine, substantially as specified.

In testimony whereof l alix my signature in presence of two Witnesses.

JOHN H. MONTGOMERY. Witnesses:

ALFRED A. EIoKs, M. Gr. IRION. 

